Change the motherboard to ASRock Z77 Extreme4
Change the PSU to Corsair TX 550w
I'd pick a better constructed case
If you really are going for a GTX 680 (670 is ~$100 less and only loses 5-10% performance), then please go for a proper aftermarket cooler, the EVGA coolers are known to be extremely loud.
H80i is fine for 4.5 GHz, I overclocked my 3570k to 4.5GHz on a H60.

Your build is fine. I personally would change the case but that's purely for aesthetic reasons. Since you're building a gaming PC and purchased one of the top end GPUs there is nothing really to change. You could probably get a larger capacity SSD, but that Samsung 840 SSD is a fine choice.

Yeah, but it still isn't as good as ASUS/Gigabyte/MSI which is around the same pricerange.

depends how much you value a one of kind warranty service. (performance wise signature gpu's tend to OC very good aswell)
i'd say the gpu is a splendid choice but dropping down to a gtx 670 would yield more budget for other parts.( kraken X40 is better compared to a h80i iirc from anandtech bench)
also meh on samsung ssd's

edit: kraken best high end , corsair mid tier. (x60 for utter overkill and H80i if you want allround performance)

The Samsung 840 (non pro) SSD is a good consumer drive. Unless he's doing something like over 20GB of writes per day there is no reason to swap that product for anything else. It certainly is one of the strongest consumer drives on the market.

---------- Post added 2013-01-18 at 08:07 PM ----------

The Kraken x40 is weaker than the H80i, but then the latter costs $10 more. Out of the two though the H80i is cooler and quieter.

looking at reviews and videos, h100 might be a good option, depending on the case. In quiet mode, you could easily overclock it to where you want it while staying very cool and very quiet. Definitely, if you were planning on going to the h80, the h100 is only about $10-20 more for better performance.

As far as case, maybe the Fractal Design R4, NewEgg currently has the Titanium Side Window one on sale for 89.99. I have the Black Pearl version. Extremely well built, nice looking case with a lot of cable management and even spot on the case behind the mobo for ssd drives. There are also extra spots for extra fans and even removable cleanable dustguards that can be taken out and cleaned. A completely removable set of drive bays for better air flow throughout too. A lot of thought and desgn went into it. I like it a lot.

As far as mobo, currently have the ASRock Extreme 6. I read a few reviews and ones comparing the 2, and the 6 just came out to be a better built, better heatsinks, etc... for $20 more. I think the only main advantage is the dual BIOS switch that the UD3H has.

SSD's, consider going a bit bigger if you only have 1 that you are going to use, 256gb type. Price per GB is pretty good atm.

In my opinion the WD caviar Red HDD's are looking better and better, really tempting to purchase one to replace my Black disks! Go check the tests and reviews on them, cheap and good performance is win.